Analcime Mineral Data

General Analcime Information

Chemical Formula:

NaAlSi2O6•(H2O)

Composition:

Molecular Weight = 220.15 gm

Sodium 10.44 % Na 14.08 % Na₂O

Aluminum 12.26 % Al 23.16 % Al₂O₃

Silicon 25.51 % Si 54.58 % SiO₂

Hydrogen 0.92 % H 8.18 % H₂O

Oxygen 50.87 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaAl(Si₂O₆)•(H₂O)

Environment:

Occurs frequently in basalts and other basic igneous rocks associated with other zeolites.

IMA Status:

Valid Species (Pre-IMA) 1801

Locality:

From near Catanes, Cyclopean Isles, Italy. Link to MinDat.org Location Data.

Name Origin:

From the Greek word meaning weak, referring to a weak electrical charge developed on rubbing.

Name Pronunciation:

Analcime

Synonym:

Analcidite

Analcite

Analzim

ICSD 2930

PDF 42-1378

Analcime Image

Images:

Analcime

Comments: Brownish yellow transparent analcime crystals.
Location: Guam. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Serandite Analcime Natrolite

Comments: Orange-red, blocky serandite with white, blocky natrolite and white, equant grains of analcime.
Location: Mt. St. Hilaire, Canada. Scale: 4 x 3 cm.
© Fabre Minerals

Images:

Behoite Analcime

Comments: Gray-white microcline crystals up to 4 cm coated with overgrowth of analcime 18 mm diameter, black aegirine up to 25 mm and most notable, a pale pink behoite.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., QuÃ©bec, Canada. Scale: 5x4x3 cm.
© John Betts - Fine Minerals

Analcime Crystallography

Axial Ratios:

a:b:c =1.0004:1:1.0001

Cell Dimensions:

a = 13.71, b = 13.7044, c = 13.7063, Z = 16; alpha = 90.158°, beta = 89.569°, gamma = 89.543° V = 2,575.08 Den(Calc)= 2.27

Crystal System:

Triclinic - Pedial H-M Symbol (1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.43(1), 2.925(0.8), 5.61(0.8),

Forms:

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Forms: ( 2 1 1)

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Physical Properties of Analcime

Cleavage:

{001} Indistinct, {010} Indistinct, {100} Indistinct

Color:

White, Grayish white, Greenish white, Yellowish white, Reddish white.

Density:

2.3

Diaphaneity:

Transparent to Subtransparent to translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

5 - Apatite

Luminescence:

Fluorescent, Short UV=green blue white, Long UV=green, creamy white yellow.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Analcime

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2143,KPDmeas= 0.2115,KC= 0.216
Ncalc = 1.49 - 1.5

Optical Data:

Biaxial (?), a=1.479-1.493, g=1.48-1.494, bire=0.0010

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Calculated Properties of Analcime

Electron Density:

Bulk Density (Electron Density)=2.27 gm/cc
note: Specific Gravity of Analcime =2.27 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Analcime= 1.52 barns/electron
U=PE_Analcime x rElectron Density= 3.45 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Analcime is Not Radioactive

Analcime Classification

Dana Class:

77.01.01.01 (77)Tectosilicate Zeolite group

(77.01)true zeolites

(77.01.01)Analcime and related species

77.01.01.01 Analcime NaAlSi2O6•(H2O) P1 1

77.01.01.02 Pollucite (Cs,Na)2Al2Si4O12•(H2O) I a3d 4/m 3 2/m

77.01.01.03 Wairakite CaAl2Si4O12•2(H2O) I2/a 2/m

77.01.01.04 Laumontite CaAl2Si4O12•4(H2O) C 2/m 2/m

77.01.01.05 Hsianghualite Ca3Li2Be3(SiO4)3F2 I 2₁3 2 3

Strunz Class:

09.GB.05 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GB -Chains of single connected 4-membered rings

09.GB.05 Ammonioleucite (NH4,K)AlSi2O6 I 4₁/a 4/m

09.GB.05 Analcime NaAlSi2O6•(H2O) P1 1

09.GB.05 Hsianghualite Ca3Li2Be3(SiO4)3F2 I 2₁3 2 3

09.GB.05 Lithosite K6Al4Si8O25•(H2O) P 2₁ (pseudo ORTH) 2

09.GB.05 Leucite KAlSi2O6 I 4₁/a 4/m

09.GB.05 Pollucite (Cs,Na)2Al2Si4O12•(H2O) I a3d 4/m 3 2/m

09.GB.05 Wairakite CaAl2Si4O12•2(H2O) I2/a 2/m

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Analcime

NaAlSi2O6•(H2O)
Dana No: 77.01.01.01 Strunz No: 09.GB.05
Locality:

Notes:

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